$25 Off $50 For Select American Express Card CustomersThis is an invitation-only offer, and only available to select customers.
Eligible customers are those who actively use an American Express card that accrues AmEx Points.
This includes many business AmEx cards and AmEx Blue, but not all cards.
Contact American Express to see whether your card works with Pay With Points.
This deal requires paying, at least in part, for your order using American Express points.
To get the deal,

Check if you are eligible to get $25 savings on a $50 order,
Click Here.
You must be logged-in to your Amazon account.

Click the yellow Coupon button in the middle, if you see it.

If you see the text, "Coupon Clipped", the deal is active for you.

Add $50 or more of eligible products sold & shipped by Amazon to your cart.

Under "Choose a Payment Method", select your American Express Membership Rewards eligible American Express Card and pay for at least a portion of your order with Membership Rewards points.
You can specify as little as $1 worth of AmEx points, the rest can go on your AmEx card.

A $25 discount should apply to your order.
Be sure you see the discount before submitting your order.

This is a great deal if your account is eligible.
For example, if you are also an Amazon Prime member, you can get: